body{
	background: #333333;
}

#one{
	height: 600px;
}
section{
	width: 800px;
	margin: 0 auto;
	background: #dedede;

}
header{
	color: #dedede;
	width: 800px;
	height: 50px;
	background: #333333;
	text-align: center;
	line-height: 50px;
}
header a{
	color: #dedede;
	text-decoration: none;

}
header h1 {
	float: left;
	height: 50px;
	margin: 0;
}
header ul{
	margin:0;
	float: right;
	width: 340px;
	height: 50px;

}
header li {
	font-size: 12px;
	color: #dedede;
	float: left ;
	margin:0 5px;
	text-align: center;
	list-style-type: none;
}

div{
	width: 760px;
	margin: 20px auto;
	background: #fff;
}

div article{
	padding: 20px;
}
div p{
	width: 350px;
	background: #dedede;
	margin: 10px;
	float: left;
	text-align: center;
}

#san{
	width: 25%;
	height: 25%;
	margin: 80px;
}


/*第二部分*/

#two{
	height: 1140px;
}
#two h4{
	padding-top:20px;
	margin-left: 20px;
}
#two figure{
	width: 200px;
	height: 200px;
	padding: 20px;
	margin-bottom:20px; 
	border: #dedede solid 1px;
	text-align: center;
}
#two img{
	margin-top: 20px;
	width: 150px;
	height: 150px;
}


/*第三部分*/
#three{
	width: 720px;
	height: 300px;
	padding: 20px;
}

table{
	width: 700px;
	margin: 0 auto;
	text-align: center;
}
table th{
	color: #fff;
	background: #333333;
}

table tr:last-child{
	background: #dedede;
}


/*第四部分*/
#four{
	width: 720px;
	height: 450px;
	padding: 20px;
}

#four h4{
	height: 20px;
	padding: 10px;
	line-height: 20px;
	border-left: #dedede solid 5px;
}


#four form div{
	width: 500px;
	margin: 10px auto;
} 
#four>div{
	width: 180px;
	height: 200px;
}

#four  .explain{
	width: 130px;
	text-align: right;
	display: inline-block;

}


#alert{
	color: #666;
	display: block;
	width: 300px;
	text-align: right;
	margin: 5px 0;

}

#four textarea{
	vertical-align: top;
}

#submit{
	font-size: 16px;
	color: #fff;
	width: 680px;
	height: 40px;
	border-radius: 10px;
	margin-left: 20px;
	background: #3355d0;

}

footer{
	width: 800px;
	height: 60px;
	color: #fff;
	font-size: 14px;
	line-height: 60px;
	background: #000;
	margin: 0 auto;
	text-align: center;
}
